Projectile Penetrating Multilayer Composite Armor

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Objectives: The objective of this paper is to study the influence of interface between multi layered composite structures in penetration problems, using finite element solver RADIOSS. Methods/Statistical Analysis: Finite element modeling of the penetrating projectile, multilayer composite and analysis using RADIOSS is done. The analysis is confined to Johnson Cook material model for plasticity and failure. One of the important aspects of material model is the representation of the plasticity and failure region. The modified interface creates a realistic environment with combination of TYPE 2 and TYPE 7 influences multiple hit of projectiles and does not influence the depth of penetration when compared to the TYPE 7 interface. Findings: Hyper Works software tool is used to simulate the projectile penetrating armor plate and Hyper Mesh used for preprocessing and RADIOSS as a solver. The depth of penetration is not significantly affected due to the TYPE 2 interface. However, the delamination behavior of the layers is captured in the TYPE 2 interface when compared to TYPE7. The modified interface with combination of TYPE 2 and TYPE 7 does not influence the depth of penetration when compared to the TYPE 7 interface. TYPE 7 formulations gives considerably acceptable results for capturing the depth of penetration in case of multilayer composite structures. TYPE 2 interfaces has to be studied in cases where delamination has influence, for example in multiple hits of projectiles etc. Application/Improvements: Development of alternative material or sandwich structure is required for the future war scenario to prevent the main threats for Armored Fighting Vehicles (AFVs), shock and penetration as future war scenario insists on light tanks that can withstand penetration with higher order of destruction.